If you hate mosquitos as much as I do you should invest in one of these! I was always told I have sweet blood because mosquitos love me! Ugh! We moved to the gulf area recently & discovered the mosquitos here are the worst that we've experienced in our life! We treat our yard with sprays & chemicals because the skeeter problem is just that bad, if we didn't they would just congregate by our doors & swarm us & the dogs. When we don't have the yard spray applied, we found that this works great! The skeeters stay at a distance from us with the ThermaCell on, but once you step a little out of the covered area you'll get chomped on. I gave the Deet category a 5 because it's not applied directly to you. There is no odor & no icky bug spray feel because it's a repellent to use in the air. I gave the protection time a 4 because although the box says it lasts for 12 hours it gets costly running it daily. The refills are a little costly & I calculated it to cost $150 a month for us to run it daily. We have found it to be far more effective than the OFF Clip-On. This is totally worth the money we paid for it.